Option to hide progress bar

[martinhoyer]

Is your feature request related to a problem? Please describe.
When Voice is opened, progress bar of each book is show. Some users might prefer not knowing their progress when reading a fiction, as it is a spoiler of sorts.

Describe the solution you'd like
A check box in preferences menu to be able to opt-out from displaying the progress bar.

Describe alternatives you've considered
My currecnt workaround is an android widget resized to 1x1, which is basically play/pause button.

Additional context
There is also remaining time displayed in the menu which would need to be hidden.
With hide option checked, progress bar could still be shown when focused to a title, i.e. just affecting "the Current menu"